Chroma

Python-first embedded vector store; pip install and prototype RAG.

Chroma is an open-source embedding database (vector store) designed to be the storage and retrieval layer for LLM applications. It provides a simple Python and JavaScript API for adding documents, generating or supplying embeddings, and running similarity queries with metadata filtering, and can run in-memory, as a local persistent store, or in client-server mode. It is popular for its low-friction developer experience in building RAG prototypes.